### Please describe the problem.

Mimeencoding detection doesn't work for files with Cyrillic filenaes.

### What steps will reproduce the problem?

I have

```
git annex config --set annex.largefiles 'mimeencoding=binary and largerthan=0'
```

So I expect all binary files to be annexed.

But I have some jpg file with Cyrillic letters in filename: привет.jpg

```
$ file --mime-encoding привет.jpg
привет.jpg: binary

$ git annex add привет.jpg --verbose
add привет.jpg (non-large file; adding content to git repository) ok
(recording state in git...)

$ mv привет.jpg hello.jpg

$ git annex add hello.jpg --verbose
add hello.jpg
ok
(recording state in git...)
```

### What version of git-annex are you using? On what operating system?

git-annex 10.20220223-g8f6b52b77

Windows 11

### Have you had any luck using git-annex before? (Sometimes we get tired of reading bug reports all day and a lil' positive end note does wonders)

I just started using it and I love it. I like it more than git LFS

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